It describes a (foiled) military attack by Japan on America.
It was rejected from publication by Cosmopolitan on the grounds that "we do not think this is the time to publish anything which might aggravate the tensions with our Japanese friends", months before the Attack on Pearl Harbor.
The Saint unearths a plan by a clandestine Japanese army known as the Black Dragon to attack southern California by surprise as a prelude to a larger invasion.
The 237-page typewritten document "with manuscript corrections in pencil by the author" which he gave to a friend in Ireland, emerged at a private auction in 2017 with Max Hasler of London-based Forum Auctions.
This article about a World War II novel first published in the 1940s is a stub.